amoolo 3/8" Cobalt Drill Bit(5Pcs)
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Jobber Drill Bits
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About amoolo 3/8" Cobalt Drill Bit(5Pcs)
Overall Feedback:
80% positive
76% appreciated its precise drilling accuracy, though 24% experienced deviation
I'm not sure what was going on with the 7/64th bit and later I broke the tip off another bit, so the hardness is really there.
I am disappointed with the performance of the drill bit. It is worse than what I would expect from an ordinary high speed steel bit.
76% praised for its fast drilling speed, while 24% found it slow
I can work through 1/16 to 1/8 in of sheetmetal in around 15 seconds.
My drilling experience with this bit was not satisfactory as the time taken to drill each hole increased with each subsequent hole.
76% liked its long-lasting durability, but 24% experienced frequent breakage
I'm not sure what was going on with the 7/64th bit, but I broke the tip off another bit, so the hardness is really there.
I've noticed that the bits break several times when they hit a hard spot and get warm.
75% liked the comfortable grip design
The drill bits cut through angle iron with ease and last for many uses before becoming dull.
72% found it resistant to heat buildup, but 28% experienced thermal damage
I noticed that the drill bits dulled immediately with the first use through thin sheet metal and glowed red-hot with the third attempt. This indicates that the drill bits are not heat resistant.
The drill bits are not heat resistant as they dulled immediately through thin sheet metal and glowed red-hot with the third attempt.
I've noticed that the drill bits tend to break when they hit a hard spot and get warm, which suggests that they are not heat resistant.
Rephrased: The drill bits are not heat resistant as they tend to break when hitting a hard spot and getting warm.
74% praised for its versatility in drilling various materials, though 26% had difficulty with metal
The drill bits advertised for drilling metal dulled immediately with the first use through thin sheet metal and glowed red-hot with the third attempt.
